Note that:
I’m sorry to ask for help again , but I can’t prove the following identity:
I have tried but I’m afraid I simply can’t do it.
I keep getting:
And I can’t see how to equate the numerators. I think I've probably made a mistake.
A hint would be very much appreciated.
Thank you.
That wasn't as easy as I thought it was going to be. My instinct was to write as well, but that was a mess. I got there, following your work, by expanding and factoring the expression you gave me.
Thank you very much. There's so much to learn and you are all really helping a lot.